Mana Vault

Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay 4.
If you do, untap Mana Vault. At the beginning of
your draw step, if Mana Vault is tapped, it deals 1
damage to you. Tap: Add {c}{c}{c}.

The world is grey, the mountains old, The forge's
fire is ashen cold. No harp is wrung, no hammer
falls. The darkness dwells in Durin's halls